. /.  WORLD TRADE  
ORGANIZATION   
G/TBT/N/MEX/231 
30 May 2012 
 (12-2859) 
Committee on Technical Barriers to Trade Original:   Spanish 
  
 
NOTIFICATION 
 
The following notification is being circ ulated in accordance with Article 10.6. 
 
1. Notifying Member:   MEXICO 
If applicable, name of local government involved (Articles 3.2 and 7.2):  
2. Agency responsible:   Secretaría de Energía (Ministry of Energy) 
Name and address (including telephone and fax numbers and e-mail and website 
addresses, if available) of  agency or authority designated to handle comments 
regarding the notification shall be  indicated if different from above:  
Comité Consultivo Nacional de Normalizaci ón para la Preservación y Uso Racional de los 
Recursos Energéticos  (National Advisory Committee on Standardization for the 
Conservation and Rational Use of Energy Resources) Río Lerma 302, 5o. piso Colonia Cuauhtémoc, Delegación Cuauhtémoc 06500, México, D.F. 
E-mail: fernando.hernandez@conuee.gob.mx  and margarito.sanchez@conuee.gob.mx  
Website: http://www.energia.gob.mx  
3. Notified under Article 2.9.2 [X], 2.10 .1 [ ], 5.6.2 [ ], 5.7.1 [ ], other:  
4. Products covered (HS or CCCN where applicable, otherwise national tariff heading.  
ICS numbers may be provided in addition, where applicable):   Glass and glazing 
systems (International Classification for Standards (ICS) code 81.040) 
5. Title, number of pages and lang uage(s) of the notified document:  
PROY-NOM-024-ENER-2011, Características térm icas y ópticas del vidrio y sistemas 
vidriados para edificaciones.  Etiquetado y métodos de prueba (Draft Mexican Official 
Standard PROY-NOM-024-ENER-2011:  Thermal and optical characteristics of glass and 
glazing systems for buildings.  Labelling and test methods) (31 pages, in Spanish) 
6. Description of content:   The notified draft Mexican Official Standard applies to 
homogeneous, transparent and translucent glass and glazing systems that are manufactured domestically or imported for use in buildings in Mexico.  
7. Objective and rationale, including the nature of urgent problems where applicable:  
The notified draft Mexican Official Standard establishes the obligation to certify the optical 
and thermal characteristics of glass and glazing systems, and the test methods for verifying such characteristics, with a view to en suring the thermal performance of building 
envelopes.  G/TBT/N/MEX/231 
Page 2  
 
  8. Relevant documents:   ISO 9050:2003:  Glass in building - Determination of light 
transmittance, solar direct transmittance, to tal solar energy transmittance, ultraviolet 
transmittance and related glazing factors.   Chapter 3 and tables 1, 2 and 3. 
9. Proposed date of adoption: 
Proposed date of entry into force:  Not applicable 
180 days after the publication of its final 
version in the Official Journal. 
10. Final date for comments:   16 July 2012 
11. Texts available from:  National enquiry  point [X] or address, telephone and fax 
numbers and e-mail and website addresses, if available, of other body: 
Secretaría de Economía 
Subsecretaría de Competitividad y Normatividad 
Dirección General de Normas Tel.: (+52) 55 5729 9100, Ext. 43217 Fax: (+52) 55 5520 9715 E-mail: normasomc@economia.gob.mx  and/or jesus.figueroa@economia.gob.mx  
Website: " http://www.economia.gob.mx/comunidad-negocios/normalizacion/catalogo-
mexicano-de-normas " 
 
Text available online at: http://dof.gob.mx/index.php? year=2012&month=05&day=17  
http://members.wto.org/crnattach ments/2012/tbt/MEX/12_1917_00_s.pdf